[go: up one dir, main page]

WO2018148014A1 - Appareils et procédés de mesure de courroies - Google Patents

Appareils et procédés de mesure de courroies Download PDF

Info

Publication number
WO2018148014A1
WO2018148014A1 PCT/US2018/015062 US2018015062W WO2018148014A1 WO 2018148014 A1 WO2018148014 A1 WO 2018148014A1 US 2018015062 W US2018015062 W US 2018015062W WO 2018148014 A1 WO2018148014 A1 WO 2018148014A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
correlation
auto
time delay
profile record
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2018/015062
Other languages
English (en)
Inventor
William S. Murray
Jason Lagneaux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laitram LLC
Original Assignee
Laitram LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Laitram LLC filed Critical Laitram LLC
Priority to BR112019014563-0A priority Critical patent/BR112019014563B1/pt
Priority to US16/480,052 priority patent/US10794686B2/en
Priority to EP18751826.1A priority patent/EP3580522B1/fr
Priority to CN201880010173.8A priority patent/CN110249202B/zh
Publication of WO2018148014A1 publication Critical patent/WO2018148014A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/043—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
    • G01B21/045—Correction of measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/04—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B7/042—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light

Definitions

  • the invention relates generally to apparatus and methods for measuring conditions, such as the pitch or speed of belts or chains, by measuring the passage of topographical features in the profile of the belts or chains with distance measurements.
  • Stretching also presages belt failures due to aging. Because belt failures can be costly, a number of schemes for measuring belt stretch have been used. Many of those schemes require that special-purpose markers be added to a belt separated by a nominal distance. Detectors along the belt's travel path sense the passage of the markers and determine belt stretch from the times of passage. Conventional special-purpose markers serve no purpose other than as detectable position marks on a belt.
  • One version of apparatus for measuring belts comprises and a processor receiving first distance measurements from a first rangefinder and producing a first profile record of a predetermined number of sequential first distance measurements and determining the occurrences of the regularly spaced topographical feature in the first profile record.
  • the first rangefinder makes the first distance measurements from the first rangefinder to a belt having a regularly spaced topographical feature and advancing at a belt speed in a direction of belt travel transverse to the distance between the first rangefinder and the belt.
  • Another version comprises a first rangefinder and a second rangefinder.
  • the first rangefinder makes first distance measurements to a belt having a regularly spaced topographical feature and advancing in a direction of belt travel transverse to the distance between the first rangefinder and the belt.
  • the second rangefinder makes second distance measurements from the second rangefinder to the belt.
  • the second rangefinder is offset from the first rangefinder in the direction of belt travel by a separation distance.
  • a processor receives the first and second distance measurements, produces corresponding first and second records of a predetermined number of sequential first and second distance measurements, and produces a cross-correlation of the first record and the second record to determine a cross-correlation time delay between the occurrence of the topographical feature in the first record and the occurrence of the topographical feature in the second record.
  • a method for measuring belts comprises: (a) advancing a belt having a regularly spaced topographical feature in a direction of belt travel at a belt speed; (b) making first measurements constituting a profile of the belt along its length; (c) producing a first profile record of a predetermined number of sequential first
  • FIG. 1 is a schematic side elevation view of one end of a modular conveyor belt monitored by a distance-measuring apparatus embodying features of the invention
  • FIG. 2 is a plot of two sets of distance measurements made by the distance- measuring apparatus of FIG. 1;
  • FIG. 3 is a cross-correlation of the two sets of distance measurements of FIG. 2;
  • FIG. 4 is an auto-correlation of one of the two sets of distance measurements of FIG. 2;
  • FIG. 5 is a flowchart of one version of a method for measuring belt pitch and speed using an apparatus as in FIG. 1.
  • the apparatus comprises two sensors, rangefinders Si, S2, offset a predetermined distance in the direction of travel 10 along the length of a conveyor belt 12.
  • the optical rangefinders Si, S2 in this version are laser rangefinders whose transmitted beams 14, 16 are separated by a separation distance ds parallel to the direction of belt travel 10.
  • the rangefinders Si, S2 are mounted to a conveyor frame member 18 at a distance from the conveyor belt 12 transverse to the direction of belt travel 10. In this example the distance, measured along the transmitted laser beams 14, 16, is perpendicular to the direction of belt travel 10. When mounted with their beams parallel, the sensor spacing is the same equals the separation distance ds of the two transmitted beams 14, 16.
  • the beams 14, 16 each illuminate a spot on the belt 12.
  • Reflected beams 15, 17 return to the rangefinders Si, S2, which have imagers, such as CCD arrays that detect the reflections, and signal conditioning and processing electronics that determine the ranges to the reflecting surfaces of the belt 12.
  • the range measurements are sent to a processor 20 over a communications link 22.
  • the processor 20 may be a general-purpose computer with data memory and program memory that is programmed to analyze the rangefinder's measurements.
  • the processor 20 can also be programmed to control the sample rate of the rangefinders Si, S2 over the communications link 22.
  • the two parallel transmitted beams 14, 16 strike the conveyor belt 12 at two points separated by d$ on a facing target surface 24 of the belt.
  • the working range 26 of the rangefinders 14, 16 extends along their transmitted beam paths from the closest point of approach 28 to the farthest point of approach 30 of the target surface 24 of the belt 12.
  • a standoff distance 32 extends from the rangefinders Si, S2 to a point within the working range 26.
  • the rangefinders Si, S2 detect ranges to regularly spaced topographical features in a profile of the belt 12.
  • the regularly spaced topographical feature is a drive bar 34 that protrudes downward from belt's target surface 24.
  • the regularly spaced topographical feature 34 is an inherent feature of the belt 12 that has a main function; namely, engaging a drive sprocket that drives the belt on the drive bar 34.
  • the drive bar 34 is not a feature whose sole purpose is to serve as a range marker to be measured by the rangefinder— although such dedicated-purpose features could be used.
  • topographical features need not be protrusions, like the drive bar 34; they can be any regularly spaced features in the profile of the belt—including recesses.
  • rangefinding apparatus can be used with already existing belts having topographical features without adding a special-purpose marker, such as a magnet or a printed mark.
  • FIG. 2 shows two sets of sampled distance measurements Di, D2 made by the two rangefinders Si, S2 of FIG. 1.
  • the two sets of distance measurements are artificially offset from each other along the Distance axis in FIG. 2 to make them easier to see.
  • the shape of the two time series Di, D2 corresponds to the profile of the target surface of the belt 12.
  • Minimum values 36, 38 in the two time series of distance measurement data Di, D2 correspond to the regularly spaced features 34 on the belt 12.
  • the minimum distance values of the first rangefinder's profile record Di occur shortly before the second rangefinder's minima in its profile record D2.
  • the difference in time /3 ⁇ 4 between these two minima is inversely proportional to the belt speed Vb.
  • FIG. 3 shows the cross- correlation of the first and second rangefinder distance measurements Di, D2 of FIG. 2.
  • the length of each profile record Di, D2 includes at least two occurrences of the regularly spaced topographical feature. So the profile record lengths should be longer than twice the belt pitch at maximum stretch to guarantee that at least two occurrences of the regularly occurring topographical feature of interest appear in the profile records.
  • the cross-correlation function R21 is created by shifting Di to the right in FIG. 2 while D2 is held stationary. The shifting is performed one measurement sample interval at a time.
  • the cross-correlation R12 could alternatively be used.
  • the peaks of the cross- correlation provide a more accurate indication of the time delay than the peaks or edges of the times series Di, D2.
  • Pix corresponds to ts in FIG. 2 and is used to determine belt speed.
  • the time delay ⁇ ⁇ between consecutive peaks, for example, between Pix and P ⁇ x, corresponds to t v in FIG. 2 and can be used to measure belt pitch if belt speed is known a priori or has been calculated. Or belt pitch can be calculated as dp d$ (T P /T S ) without an intermediate calculation of belt speed. Both ⁇ $ and ⁇ ⁇ are more robust measures
  • FIG. 4 shows the auto-correlation R11 of the first data profile record Di.
  • the auto-correlation R11 is the correlation of profile record Di with itself.
  • R22 is the autocorrelation of D2.
  • the next consecutive peak P2A occurs when the first occurrence of the minimum value in shifted profile record Di (FIG. 2) aligns with the second occurrence of the minimum value in unshifted profile record Di.
  • the time delay ⁇ between consecutive peaks PIA, P ⁇ A in R11 (or in R22) can be used to measure belt pitch in the same way as t v and ⁇ ⁇ .
  • the auto-correlation does not have to be performed at every sample point. Instead, auto-correlation values outside a predetermined later region of interest 44 spanning the expected occurrence of the next peak after the peak PIA need not be computed. Searching for the peak P2A can be limited to auto-correlation values in that region of interest 44. Belts with small topographical features of interest result in auto-correlations with low signal-to-noise ratios. So searching for peaks only in a predetermined region of interest is necessary to avoid selecting an incorrect peak. A similar region of interest can also be applied to the time series Di, D2 if they are used directly to calculate pitch or belt speed.
  • the flowchart of FIG. 5 describes one method for determining the speed and pitch of a belt using correlation techniques.
  • An executable program according to the flowchart and saved in the processor's program memory and executed by the processor (20, FIG. 1) controls the measurement cycle, performs the auto- and cross-correlations, computes the belt speed and the belt pitch, and performs other functions, such as accepting operator inputs and displaying or sounding alarms in the event of an impending belt failure or other alarm condition.
  • the processor In acquiring measurement data at step 50, the processor reads the rangefinders and stores their distance measurements in buffers in the processor's data memory. From each of the two buffers the processor's program acquires a record of measurement data and checks to see if any measurements lie outside an acceptable range. If any value in the record is out of range, that record and the corresponding record of the other rangefinder's measurement data are discarded and new profile records are acquired. Both records are synchronized in time. The processor computes the mean value for each valid data record and subtracts the mean value from each measurement value at step 52 to produce zero-mean measurement records. The two zero-mean data profile records are then correlated with each other and themselves. The first rangefinder's measurement profile record is cross-correlated with the second rangefinder's profile record at step 54.
  • a peak-finding routine finds all the peaks, i.e., all the relative maxima, in the cross-correlation at step 56.
  • the processor computes the root- mean-square (rms) value of the cross-correlation at step 58.
  • a peak threshold level is set at step 60 as a function of the rms value to eliminate peaks due to noise and distance measurements corresponding to other salient topographical belt features not of interest and to other belt features that produce high auto-correlation peaks, but are not located at the belt pitch distance.
  • the peak threshold 46 is used at step 56 to find the peaks in the cross- correlation R12 due to the salient belt feature of interest as shown in FIG. 3.
  • the processor selects the first-occurring peak Pix above the threshold 46.
  • the time delay Ts of the occurrence of that peak from the start of the cross-correlation R12 is used at step 64 to compute the belt velocity Vb as cUlxs, where ds is the known rangefinder separation distance. If the belt speed is known a priori as measured by a different sensor or as reported by a belt- motor controller, the belt speed Vb does not have to be computed as in step 64; and, in fact, the cross-correlation does not have to be performed and only one sensor is required.
  • the belt speed z3 ⁇ 4 computed for each profile record at step 64 or provided from another source can then be applied to a low-pass digital filter to provide a running average of the belt speed at step 66 to provide a better estimate of belt pitch by filtering out noise.
  • the processor calculates belt pitch P as ⁇ 3 ⁇ 4 ⁇ or as the product of the rangefinder separation distance ds and the ratio of the average of the first and second auto-correlation time delays ( ⁇ ⁇ ⁇ ' + ⁇ ⁇ 2')/2 to the cross-correlation time delay Ts.
  • the belt pitch P can be filtered to produce a smoother running average at step 76.
  • the processor then repeats the steps at a predetermined rate for a new set of distance measurements.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Control Of Conveyors (AREA)

Abstract

L'invention concerne un appareil et des procédés permettant de déterminer la vitesse et le pas d'une courroie au moyen de techniques de corrélation. L'appareil comprend une paire de télémètres séparés d'une distance prédéterminée. Les télémètres mesurent chacun la distance à la courroie au niveau de deux positions séparées l'une de l'autre dans la direction de déplacement de la courroie. L'appareil crée au moins un enregistrement de profil de série temporelle correspondant au profil d'une courroie. Les temps d'attente entre les apparitions d'un élément topographique régulièrement espacé dans le profil de la courroie sont utilisés par un processeur pour calculer le pas et la vitesse de la courroie. Des techniques de corrélation sont utilisées pour des résultats fiables.
PCT/US2018/015062 2017-02-09 2018-01-24 Appareils et procédés de mesure de courroies Ceased WO2018148014A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR112019014563-0A BR112019014563B1 (pt) 2017-02-09 2018-01-24 Aparelho para medição de correias e método para medir uma correia com uma característica topográfica regularmente espaçada
US16/480,052 US10794686B2 (en) 2017-02-09 2018-01-24 Apparatus and methods for measuring belts
EP18751826.1A EP3580522B1 (fr) 2017-02-09 2018-01-24 Appareils et procédés de mesure de courroies
CN201880010173.8A CN110249202B (zh) 2017-02-09 2018-01-24 用于测量带的装置和方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762456875P 2017-02-09 2017-02-09
US62/456,875 2017-02-09

Publications (1)

Publication Number Publication Date
WO2018148014A1 true WO2018148014A1 (fr) 2018-08-16

Family

ID=63107704

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2018/015062 Ceased WO2018148014A1 (fr) 2017-02-09 2018-01-24 Appareils et procédés de mesure de courroies

Country Status (4)

Country Link
US (1) US10794686B2 (fr)
EP (1) EP3580522B1 (fr)
CN (1) CN110249202B (fr)
WO (1) WO2018148014A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025162602A1 (fr) 2024-01-31 2025-08-07 Afher Eurobelt, S.A. Système et procédé de surveillance de bandes transporteuses modulaires

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK4146955T3 (da) * 2020-05-08 2025-10-06 Buehler Gmbh Transportindretning med mindst én kæde
DE102021107899A1 (de) * 2021-03-29 2022-09-29 Iwis Antriebssysteme Gmbh & Co. Kg Kettensensorvorichtung und verfahren zur ermittlung des verschleisses
US12037201B2 (en) 2021-12-07 2024-07-16 Laitram, L.L.C. Measuring conveyor belt stretch

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4887155A (en) 1986-12-06 1989-12-12 Robert Massen Method and arrangement for measuring and/or monitoring properties of yarns or ropes
US6047814A (en) * 1996-10-31 2000-04-11 Conttechtrasnsportbandsysteme Gmbh Method for monitoring a conveyor belt and system therefor
US6275171B1 (en) * 1999-04-30 2001-08-14 Esco Electronics, Inc. Rangefinder type non-imaging traffic sensor
WO2001077614A1 (fr) * 2000-04-05 2001-10-18 Accu-Sort Systems, Inc. Appareil permettant de determiner les dimensions d'un objet au moyen de l'imagerie negative
US20030168317A1 (en) * 2002-01-14 2003-09-11 Fromme Christopher C. Conveyor belt inspection system and method
WO2003093783A1 (fr) 2002-05-02 2003-11-13 Castrol Limited Procede et dispositif servant a controler l'usure des maillons d'une chaine
US20080047804A1 (en) 2006-08-24 2008-02-28 Frost Links, Inc. Chain wear monitoring device
US20140268093A1 (en) * 2013-03-15 2014-09-18 Faro Technologies, Inc. Three-dimensional coordinate scanner and method of operation

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106005A (en) * 1976-05-14 1978-08-08 Nippon Konbeya Kabushiki Kaisha Apparatus for detecting elongation of a joint of a conveyor belt
US4274783A (en) * 1977-05-26 1981-06-23 Fmc Corporation Chain measuring and conveyor control system
HU180827B (en) * 1979-08-10 1983-04-29 Koezponti Banyaszati Fejleszte Method for measuring the resistance to wear of endless driving devices during operation
JPS5748521A (en) 1980-09-08 1982-03-19 Bridgestone Corp Measurement method for elongation of conveyor belt
JPH082565Y2 (ja) * 1992-03-31 1996-01-29 株式会社椿本チエイン 無端移動体の伸び測定装置
US5563392A (en) 1995-04-12 1996-10-08 Patco Sales & Service, Inc. Method and apparatus for monitoring wear of a continuous chain
US5957263A (en) 1996-09-25 1999-09-28 Advanced Robotic Technologies, Inc. Apparatus for correcting for wear of a conveyor belt
JPH10332342A (ja) 1997-05-30 1998-12-18 Tsubakimoto Chain Co チェーン伸長度の検出方法及び検出装置
CN1148562C (zh) 1998-02-13 2004-05-05 凤凰股份有限公司 持续监视传送带接合部的装置
DE10116233A1 (de) 2001-04-02 2002-05-29 Forbo Int Sa Verfahren und Vorrichtung zur Bestimmung einer relativen Längenänderung eines Antriebs-oder Förderbandes
GB2377918B (en) 2001-07-24 2006-02-01 Renold Plc Chain elongation monitoring apparatus and method
JP2004109469A (ja) * 2002-09-18 2004-04-08 Ricoh Co Ltd 画像形成装置
GB2400090B (en) 2003-04-05 2006-04-19 Renold Plc Chain wear monitoring method and apparatus
US20050159917A1 (en) * 2004-01-20 2005-07-21 Borgwarner Inc. Part length measurement technique using two or three proximity sensors
FI118273B (fi) * 2004-07-14 2007-09-14 Tamglass Ltd Oy Menetelmä lasilevyn taivutuspussikkuuden mittaamiseksi
JP2006052039A (ja) 2004-08-10 2006-02-23 Bridgestone Corp コンベアベルトのモニタリングシステム
US8285494B2 (en) * 2009-10-20 2012-10-09 Tibor Vozner Conveyor chain monitoring system and method
JP5283608B2 (ja) 2009-11-30 2013-09-04 株式会社椿本チエイン 伸張度測定装置、伸張度測定システム及びコンピュータプログラム
JP5365727B2 (ja) * 2012-05-29 2013-12-11 Ｊｆｅスチール株式会社 表面形状測定方法および表面形状測定装置
US9221618B2 (en) * 2012-11-06 2015-12-29 AMF automation Technologies, LLC Oven chain measurement system
US9772179B2 (en) * 2014-07-09 2017-09-26 Frost Tech Llc Chain wear monitoring device
US10145770B2 (en) * 2015-07-29 2018-12-04 Frost Tech Llc Chain wear monitoring device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4887155A (en) 1986-12-06 1989-12-12 Robert Massen Method and arrangement for measuring and/or monitoring properties of yarns or ropes
US6047814A (en) * 1996-10-31 2000-04-11 Conttechtrasnsportbandsysteme Gmbh Method for monitoring a conveyor belt and system therefor
US6275171B1 (en) * 1999-04-30 2001-08-14 Esco Electronics, Inc. Rangefinder type non-imaging traffic sensor
WO2001077614A1 (fr) * 2000-04-05 2001-10-18 Accu-Sort Systems, Inc. Appareil permettant de determiner les dimensions d'un objet au moyen de l'imagerie negative
US20030168317A1 (en) * 2002-01-14 2003-09-11 Fromme Christopher C. Conveyor belt inspection system and method
WO2003093783A1 (fr) 2002-05-02 2003-11-13 Castrol Limited Procede et dispositif servant a controler l'usure des maillons d'une chaine
US20080047804A1 (en) 2006-08-24 2008-02-28 Frost Links, Inc. Chain wear monitoring device
US20140268093A1 (en) * 2013-03-15 2014-09-18 Faro Technologies, Inc. Three-dimensional coordinate scanner and method of operation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3580522A4

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025162602A1 (fr) 2024-01-31 2025-08-07 Afher Eurobelt, S.A. Système et procédé de surveillance de bandes transporteuses modulaires

Also Published As

Publication number Publication date
EP3580522B1 (fr) 2024-02-21
BR112019014563A2 (pt) 2020-02-18
CN110249202B (zh) 2021-07-20
EP3580522A4 (fr) 2020-12-16
US10794686B2 (en) 2020-10-06
EP3580522A1 (fr) 2019-12-18
US20190368862A1 (en) 2019-12-05
CN110249202A (zh) 2019-09-17

Similar Documents

Publication Publication Date Title
US10794686B2 (en) Apparatus and methods for measuring belts
JP3976868B2 (ja) 光伝達時間を用いた光センサ
JP5932371B2 (ja) 形状測定装置
CN110749898B (zh) 一种激光雷达测距系统及其测距方法
US9268013B2 (en) Method for measuring distances
US7212278B2 (en) Method and device for recording a three-dimensional distance-measuring image
US4837718A (en) Doppler radar method and apparatus for measuring a projectile's muzzle velocity
JP3029357B2 (ja) 距離測定装置の汚れ検出装置
US11415696B2 (en) Optical sensor and electronic device
EP1460453B1 (fr) Imagerie tridimensionnelle
CN110456369B (zh) 飞行时间传感系统及其测距方法
EP1611458A4 (fr) Systemes et procedes permettant de surveiller la vitesse
US6831595B2 (en) Radar apparatus equipped with abnormality detection function
CN109946706A (zh) 光传感器及电子设备
JPH11326200A (ja) 視程測定装置
WO2013094062A1 (fr) Dispositif de mesure de distance par ondes optiques
US20120309324A1 (en) Measurement method and apparatus
CN113204027B (zh) 精确选择测距周期的脉冲式激光雷达跨周期测距方法
JP2019082436A (ja) 物体検知装置
BR112019014563B1 (pt) Aparelho para medição de correias e método para medir uma correia com uma característica topográfica regularmente espaçada
EP3798678A1 (fr) Temps de vol indépendant de la réflectivité d'objet
KR100715036B1 (ko) 교통 정보 수집 장치 및 방법
KR101966722B1 (ko) 반사판 기반 레이더에서의 특정위치 침입자 탐지 시스템 및 이를 이용한 특정위치 침입자 탐지 방법
RU2066852C1 (ru) Способ определения распределения скорости звука в жидких средах вниз по глубине
JPWO2013094062A1 (ja) 光波測距装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18751826

Country of ref document: EP

Kind code of ref document: A1

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112019014563

Country of ref document: BR

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018751826

Country of ref document: EP

Effective date: 20190909

ENP Entry into the national phase

Ref document number: 112019014563

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20190715